BIO 312: Ear, motor control, & reflexes quiz

Put the following events in order:

A. Vibration of ear ossicles

B. Vibration of basilar membrane

C. Funneling of sound into pinna

D. Sound wave enters scala vestibuli

C,A,D,B

3 multiple choice options

Which of the following sounds would travel the FARTHEST into the cochlea?

Low frequency sound

2 multiple choice options

You have initiated a rotational movement. The hair cells in the anterior semicircular canal of your left ear are hyperpolarizing and there are very few action potentials in the associated neuron. What are the hair cells in the anterior semicircular canal of your right ear doing?

Depolarizing (a lot), with a high frequency of action potentials in the associated neuron

3 multiple choice options

Where is the cell body for the upper motor neuron in the ventral corticospinal pathway?

Primary motor cortex

3 multiple choice options

Which of the following could result in flaccid paralysis?

Damage to the ventral/anterior root

3 multiple choice options

When the myotatic reflex circuit is active, what are the postsynaptic effects in the two motor neurons?

The motor neuron innervating the quadriceps has an EPSP and the motor neuron innervating the hamstrings has an IPSP

3 multiple choice options

In the myotatic reflex, what occurs after the patellar tendon is tapped?

The quadriceps contract and the hamstrings relax

3 multiple choice options

Muscle spindles are characterized as:

Encapsulated mechanoreceptors

3 multiple choice options

A spinal cord injury in the lumbar region could result in quadriplegia if it was a complete cut.

False

1 multiple choice option

In the active myotatic reflex arc, an action potential in the interneuron would occur AFTER an action potential in the sensory neuron.

True

1 multiple choice option